Merge pull request #32 from panos-kakos/master

Update from master

Author: panos-kakos

apache-kafka-2/pom.xml

@@ -121,7 +121,7 @@
 
     <properties>
         <jna.version>5.7.0</jna.version>
-        <kafka.version>3.6.1</kafka.version>
+        <kafka.version>3.9.0</kafka.version>
         <testcontainers-kafka.version>1.19.3</testcontainers-kafka.version>
         <testcontainers-jupiter.version>1.19.3</testcontainers-jupiter.version>
         <jackson.databind.version>2.15.2</jackson.databind.version>
@@ -130,4 +130,4 @@
         <awaitility.version>3.0.0</awaitility.version>
     </properties>
 
-</project>
+</project>

core-java-modules/core-java-17/src/main/java/com/baeldung/switchpatterns/ParenthesizedPatterns.java

@@ -0,0 +1,25 @@
+package com.baeldung.switchpatterns;
+
+public class GuardedPatterns {
+
+    static double getDoubleValueUsingIf(Object o) {
+        return switch (o) {
+            case String s -> {
+                if (s.length() > 0) {
+                    yield Double.parseDouble(s);
+                } else {
+                    yield 0d;
+                }
+            }
+            default -> 0d;
+        };
+    }
+
+    static double getDoubleValueUsingGuardedPatterns(Object o) {
+        return switch (o) {
+            case String s when s.length() > 0 -> Double.parseDouble(s);
+            default -> 0d;
+        };
+    }
+
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/switchpatterns/GuardedPatterns.java

@@ -0,0 +1,20 @@
+package com.baeldung.switchpatterns;
+
+public class HandlingNullValues {
+
+    static double getDoubleUsingSwitchNullCase(Object o) {
+        return switch (o) {
+            case String s -> Double.parseDouble(s);
+            case null -> 0d;
+            default -> 0d;
+        };
+    }
+
+    static double getDoubleUsingSwitchTotalType(Object o) {
+        return switch (o) {
+            case String s -> Double.parseDouble(s);
+            case Object ob -> 0d;
+        };
+    }
+
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/switchpatterns/HandlingNullValues.java

@@ -0,0 +1,14 @@
+package com.baeldung.switchpatterns;
+
+public class PatternMatching {
+
+    public static void main(String[] args) {
+        Object o = args[0];
+        if (o instanceof String s) {
+            System.out.printf("Object is a string %s", s);
+        } else if(o instanceof Number n) {
+            System.out.printf("Object is a number %n", n);
+        }
+    }
+
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/switchpatterns/PatternMatching.java

@@ -0,0 +1,14 @@
+package com.baeldung.switchpatterns;
+
+public class SwitchStatement {
+
+    public static void main(String[] args) {
+        final String b = "B";
+        switch (args[0]) {
+            case "A" -> System.out.println("Parameter is A");
+            case b -> System.out.println("Parameter is b");
+            default -> System.out.println("Parameter is unknown");
+        };
+    }
+
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/switchpatterns/SwitchStatement.java

@@ -0,0 +1,30 @@
+package com.baeldung.switchpatterns;
+
+public class TypePatterns {
+
+    static double getDoubleUsingIf(Object o) {
+        double result;
+
+        if (o instanceof Integer) {
+            result = ((Integer) o).doubleValue();
+        } else if (o instanceof Float) {
+            result = ((Float) o).doubleValue();
+        } else if (o instanceof String) {
+            result = Double.parseDouble(((String) o));
+        } else {
+            result = 0d;
+        }
+
+        return result;
+    }
+
+    static double getDoubleUsingSwitch(Object o) {
+        return switch (o) {
+            case Integer i -> i.doubleValue();
+            case Float f -> f.doubleValue();
+            case String s -> Double.parseDouble(s);
+            default -> 0d;
+        };
+    }
+
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/switchpatterns/TypePatterns.java

@@ -3,9 +3,9 @@
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static com.baeldung.switchpatterns.ParenthesizedPatterns.*;
+import static com.baeldung.switchpatterns.GuardedPatterns.*;
 
-class ParenthesizedPatternsUnitTest {
+class GuardedPatternsUnitTest {
 
     @Test
     void givenIfImplementation_whenUsingEmptyString_thenDoubleIsReturned() {
@@ -17,24 +17,14 @@ void givenIfImplementation_whenUsingNonEmptyString_thenDoubleIsReturned() {
         assertEquals(10d, getDoubleValueUsingIf("10"));
     }
 
-    @Test
-    void givenIfImplementation_whenStringContainsSpecialChar_thenDoubleIsReturned() {
-        assertEquals(0d, getDoubleValueUsingIf("@10"));
-    }
-
     @Test
     void givenPatternsImplementation_whenUsingEmptyString_thenDoubleIsReturned() {
-        assertEquals(0d, getDoubleValueUsingParenthesizedPatterns(""));
+        assertEquals(0d, getDoubleValueUsingGuardedPatterns(""));
     }
 
     @Test
     void givenPatternsImplementation_whenUsingNonEmptyString_thenDoubleIsReturned() {
-        assertEquals(10d, getDoubleValueUsingParenthesizedPatterns("10"));
-    }
-
-    @Test
-    void givenPatternsImplementation_whenStringContainsSpecialChar_thenDoubleIsReturned() {
-        assertEquals(0d, getDoubleValueUsingParenthesizedPatterns("@10"));
+        assertEquals(10d, getDoubleValueUsingGuardedPatterns("10"));
     }
 
 }

core-java-modules/core-java-17/src/test/java/com/baeldung/switchpatterns/ParenthesizedPatternsUnitTest.java renamed to core-java-modules/core-java-21/src/test/java/com/baeldung/switchpatterns/GuardedPatternsUnitTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.switchpatterns;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static com.baeldung.switchpatterns.HandlingNullValues.*;
+
+class HandlingNullValuesUnitTest {
+
+    @Test
+    void givenNullCaseInSwitch_whenUsingStringAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingSwitchNullCase("10"));
+    }
+
+    @Test
+    void givenTotalTypeInSwitch_whenUsingNullArgument_thenDoubleIsReturned() {
+        assertEquals(0d, getDoubleUsingSwitchNullCase(null));
+    }
+
+    @Test
+    void givenTotalTypeInSwitch_whenUsingStringAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingSwitchTotalType("10"));
+    }
+
+}

core-java-modules/core-java-21/src/test/java/com/baeldung/switchpatterns/HandlingNullValuesUnitTest.java

@@ -0,0 +1,49 @@
+package com.baeldung.switchpatterns;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static com.baeldung.switchpatterns.TypePatterns.*;
+
+class TypePatternsUnitTest {
+
+    @Test
+    void givenIfImplementation_whenUsingIntegerAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingIf(10));
+    }
+
+    @Test
+    void givenIfImplementation_whenUsingDoubleAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingIf(10.0f));
+    }
+
+    @Test
+    void givenIfImplementation_whenUsingStringAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingIf("10"));
+    }
+
+    @Test
+    void givenIfImplementation_whenUsingCharAsArgument_thenDoubleIsReturned() {
+        assertEquals(0d, getDoubleUsingIf('c'));
+    }
+
+    @Test
+    void givenSwitchImplementation_whenUsingIntegerAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingSwitch(10));
+    }
+
+    @Test
+    void givenSwitchImplementation_whenUsingDoubleAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingSwitch(10.0f));
+    }
+
+    @Test
+    void givenSwitchImplementation_whenUsingStringAsArgument_thenDoubleIsReturned() {
+        assertEquals(10d, getDoubleUsingSwitch("10"));
+    }
+
+    @Test
+    void givenSwitchImplementation_whenUsingCharAsArgument_thenDoubleIsReturned() {
+        assertEquals(0d, getDoubleUsingSwitch('c'));
+    }
+
+}